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参数资料
型号： ST72C171K2B6
厂商： STMICROELECTRONICS
元件分类： 微控制器/微处理器
英文描述： 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PDIP32
封装： SHRINK, PLASTIC, DIP-32
文件页数： 64/152页
文件大小： 2156K
代理商： ST72C171K2B6
ST72C171
19/152
4.2.4.1 Multi-Oscillator (MO)
The Multi-Oscillator (MO) block is the main clock
supplier of the ST7. To insure an optimum integra-
tion in the application, it is based on an external
clock source and six different selectable oscilla-
tors.
The main clock of the ST7 can be generated by 8
different sources comming from the MO block:
s
an External source
s
4 Crystal or Ceramic resonator oscillators
s
1 External RC oscillators
s
1 Internal High Frequency RC oscillator
Each oscillator is optimized for a given frequency
range in term of consumption and is selectable
through the Option Byte.
External Clock Source
The default Option Byte value selects the External
Clock in the MO block. In this mode, a clock signal
(square, sinus or triangle) with ~50% duty cycle
has to drive the OSCin pin while the OSCout pin is
tied to ground (see Figure 13).
Figure 13. MO External Clock
Crystal/Ceramic Oscillators
This family of oscillators allows a high accuracy on
the main clock of the ST7. The selection within the
list of 4 oscillators has to be done by Option Byte
according to the resonator frequency in order to
reduce the consumption. In this mode of the MO
block, the resonator and the load capacitors have
to be connected as shown in Figure 14 and have
to be mounted as close as possible to the oscilla-
tor pins in order to minimize output distortion and
start-up stabilization time.
These oscillators, when selected via the Option
Byte, are not stopped during the RESET phase to
avoid losing time in the oscillator starting phase.
Figure 14. MO Crystal/Ceramic Resonator
OSCin
OSCout
EXTERNAL
ST7
SOURCE
OSCin
OSCout
LOAD
CAPACITORS
ST7
CL1
CL0
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相关代理商/技术参数
参数描述
ST72C171K2M6 功能描述:8位微控制器 -MCU Flash 8K SPI/SCI RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
ST72C215G2B6 功能描述:8位微控制器 -MCU Flash 8K SPI RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
ST72C215G2M3 制造商:STMicroelectronics 功能描述:MCU 8-Bit ST7 CISC 8KB Flash 3.3V/5V 28-Pin SO Tube 制造商:STMicroelectronics 功能描述:MCU 8BIT ST7 CISC 8KB FLASH 3.3V/5V 28SOIC - Rail/Tube
ST72C215G2M5 制造商:STMicroelectronics 功能描述:MCU 8BIT ST7 CISC 8KB FLASH 3.3V/5V 28SOIC - Rail/Tube
ST72C215G2M6 功能描述:8位微控制器 -MCU Flash 8K SPI RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
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